Mahle MS 4.070in +.005in 1.0mm 1.0mm 2.0mm File Fit Rings

When you're rebuilding an engine and need to set the perfect piston ring gap for your specific build, Mahle's MS file fit rings are a solid choice. These rings are designed to be filed to your exact clearance specifications, giving you precise control over your engine's performance and sealing. This set is sized at 4.070 inches with an additional 0.005 inches of clearance, featuring a 1.0mm top ring, a 1.0mm second ring, and a 2.0mm oil control ring.

Mahle is a well-known name in engine components, and these file fit rings reflect that. The construction is well-built, intended to provide good sealing once properly gapped. The file fit design means you'll need to carefully measure and file the ends of the top and second rings to achieve the correct gap for your cylinder bore. This is a common practice in performance builds or when working with non-standard bore sizes to ensure optimal compression and oil control.

Remember that these rings are not CARB approved and cannot be shipped to California. Always refer to your engine's specific service manual for recommended ring gap specifications and installation procedures.